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Chemgrate® Load Tables
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THE LOAD AND DEFLECTION DATA PROVIDED IN THESE TABLES ARE INTENDED FOR USE AS A GUIDE ONLY, TO HELP DETERMINE GRATING SIZE FOR A GIVEN APPLICATION.  THE USE OF DIFFERENT RESIN SYSTEMS AND TOP SURFACES CAN PRODUCE VARIATIONS, OF PLUS OR MINUS 20%, IN DEFLECTION.  OPERATING CONDITIONS AND ENVIRONMENTS CONTRIBUTE TO THE PERFORMANCE OF THE GRATING.  SINCE THESE CONDITIONS ARE NOT CONTROLLABLE, WE CANNOT GUARANTEE THE PERFORMANCE OF THE GRATING.
 

BECAUSE FRP PRODUCTS HAVE A LOW MODULUS OF ELASTICITY, BUT HAVE   A HIGH TENSILE STRENGTH, LOADS ARE GENERALLY LIMITED TO THE ALLOWABLE DEFLECTION DETERMINED BY THE END USER.  THE FOLLOWING TABLES WERE PREPARED FOR USE WITH SUPPORTS ON TWO SIDES ONLY.  THEY SHOW THE APPROXIMATE LOAD REQUIRED FOR A 1% DEFLECTION.  TABLE I REPRESENTS WALKING CONDITIONS.  TABLE II HAS TWO SETS OF NUMBERS, THE FIRST REPRESENTING DEFLECTION AT THE UNSUPPORTED END OF A PANEL, AND A SECOND FIGURE SHOWING FAILURE OF THE GRATING AT 10:1 SAFETY FACTOR (GRATING WILL FAIL AT TEN TIMES THE LOAD SHOWN).  TABLE III REPRESENTS AS EVENLY DISTRIBUTED, STATIONARY LOAD.

 

 CHEMGRATE LOAD TABLES
GRATING SIZE
DESIGNATION
HEIGHT FOLLOWED BY MESH PATTERN		 LOAD REQUIRED FOR SPECIFIED
DEFLECTION PER TABLE I LOADING
TABLE I: TYPICAL LOADING SITUATION.
CONCENTRATED LOAD ON CONTINUOUS
PANEL USING 12" X 3" BLOCK

LOAD @ 1%DEFL.2
(lbs.)
TABLE II:
CONCENTRATED LOAD USING 12" X 1" BLOCK

LOAD @
1% DEFL.2
(lbs.)

LOAD @ 10:1
SAT. FAC.3
(lbs.)
TABLE III:
UNIFORMALLY DISTRIBUTED LOAD

LOAD @ 2% DEFL.1
(lbs./ft.²)
SPAN1
(in.)		 .250"
(lbs.)		 .375"
(lbs.)

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       -
     260
     150
     100
      75
      55

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-
390
225
250
112
85

 590
340
250
180
145
125
110
550
250
140
95
70
55
40		 410
300
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150
100
80
-

880
270
110
40
25
20
20

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415
215
140
95
80		 -
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625
325
230
150
125		 1200
600
400
270
220
195
170
800
350
200
130
90
70
50		 330
220
165
130
110
95
80

1280
375
160
85
50
35
20

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665
365
250
175
140

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545
375
262
210		 1925
1000
640
440
360
300
270
1605
715
400
260
180
135
100		 660
440
330
265
220
190
165

2570
765
320
165
95
60
40

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1040
  625 
  415 
  330 
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620
500
360		 2400
1420
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750
600
560
460
1840
850
500
330
240
180
145		 800
550
425
350
300
260
235

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905
400
210
130
80
60

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1800
  1200 
   805  
  570 
  425 

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2820
1800
1207
855
640		 4770
2160
1810
1450
1160
960
820
4500
2025
1160
755
530
395
310		 960
735
600
505
440
385
345

7200
2160
930
485
280
180
125

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  550 
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1320
825
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1975
1450
1265
920
700
3670
1630
915
585
410
300
230		 1215
810
780
485
405
350
305

5872
1740
735
350
220
140
95

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3430
2220
1610
1140
860		 -
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2200
1780
1550
1280
1110
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1620
1035
720
530
405		 -
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720
575
480
410
360

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1295
660
385
240
160
¹ "SPAN" INCLUDES 1-1/2" SUPPORT
ON EACH SIDE.  CLEAR
SPAN IS 3" LESS THAN WIDTH
OF SPAN SHOWN.		     *NOT RECOMMENDED
FOR FOOT TRAFFIC
AT THIS SPAN.		     ² DEFLECTION DATA IS 1% OF SPAN.
(EXAMPLE:DATA FOR 30" SPAN
WOULD BE THE LOAD
REQUIRED TO GIVE .30"
DEFLECTION).		      ³ "SAFETY FACTOR IS DEFINED AS
ONE-TENTH THE LOAD REQUIRED
FOR THE GRATING TO FAIL.